Feature request: Natural Type input

[tethragon]

Hi. It would be awesome (for educational purposes) if you could implement a natural type input view.

For example instead of this:

We could type like this:

Something like that would require probably the addition of couple of keys (i.e. fraction/mixed fraction etc)

I would love to see such a feature (that many scientific calculators have).

Thank you.

[alfondehesa]

Second this, it would be really helpful and much easier to read hierarchies (especially in formulas where you have many parentheses). Besides fractions, exponentials should also appear at the exponent superscript.